The invention discloses a regional
integrated energy system planning optimization method based on double-layer optimization, and the method comprises the following steps: S1, selecting a plurality ofgroups of capacity schemes to carry out the
capacity optimization of a regional
integrated energy system, and finding out a plurality of groups of
capacity optimization configuration schemes of the regional
integrated energy system; S2, performing optimization operation on the plurality of groups of
capacity optimization configuration schemes planned in the step S1 to obtain a plurality of groupsof operation output results of the regional integrated
energy system, and then solving an optimization operation problem of the
system by utilizing mixed integer
linear programming (MILP); S3, carrying out capacity selection, and comparing multiple groups of operation output results in the step S2 with load requirements to obtain the load supply reliability of each group of planning schemes; S4, feeding the obtained reliability back to the capacity optimization planning in the step S1, reselecting and optimizing the capacity optimization of the regional integrated
energy system, and repeatingthe steps S1 to S1; and S3, selecting a
capacity planning scheme with the strongest power supply reliability.